UPDATE: A spokesman for Pelosi says the Democratic leader is now resuming her schedule. His statement:

"After several flights yesterday in Afghanistan, and a long flight back to Italy that arrived early this morning, Leader Pelosi was not feeling well. This morning in Rome, the Leader was advised to visit a clinic, and the closest medical facility was a hospital. The Leader is now resuming her schedule in Italy."

Rep. Bill Pascrell (D-NJ), a member of the delegation traveling with Pelosi, told NBC News from Italy earlier Monday that the House Minority Leader underwent “a few tests” but is "in good shape."

"She's at the hotel now,” Pascrell told NBC News. “She's fine, she's in good shape. Just a few tests to make sure she was all right."

Pascrell and Pelosi were traveling with a bipartisan delegation in Afghanistan before the stop in Italy.

"We had a strenuous few days in Afghanistan, but it was the most productive trip I've ever been on as a member of Congress,” Pascrell said.

Pelosi was in Italy to mark the 150thanniversary of Italian unification. News agency AFP reports that Pelosi canceled two meetings with officials due to her illness.